XTAR VC2SL Vape Battery Charger
by XTAR
No reviews yet — be the firstXTAR VC2SL steps up to 1A per slot for faster 18650 and 21700 charging. Real-time LCD voltage, auto cut-off, fits cells up to 26650. £10.99.
£10.99sold individually · inc VAT
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Written and fact-checked by the VapeCity team · Updated June 2026
XTAR VC2SL: faster 1A dual-slot charger for 18650 and 21700 vape batteries
The XTAR VC2SL is the mid-range step up from the VC2, delivering 1A of charge current per slot instead of 0.5A. For vapers who run dual-battery box mods and want fully charged cells ready before a night out rather than the next morning, the faster charge rate makes a genuine practical difference. A 3,000mAh 18650 from flat reaches 4.2V in approximately three hours at 1A versus five to six hours at 0.5A.
The SL designation refers to the slim-profile bay design that accommodates the wider 21700 format used by many current-generation high-capacity mods. Like all XTAR chargers, the VC2SL uses a constant-current / constant-voltage (CC/CV) charge algorithm that protects cell chemistry while filling the battery efficiently. At £10.99, it sits in an accessible price band for vapers who want genuine charging capability rather than the slowest viable option.
- 1A charge current per slot cuts charge time roughly in half compared to 0.5A chargers, getting 18650 cells from flat to full in around three hours.
- Two independent channels operate simultaneously at full current: charge two batteries at the same rate without either slot sacrificing amperage to the other.
- Backlit LCD displays real-time voltage for both cells, making it easy to track charge progress and spot ageing batteries that no longer hold a full charge.
- Fits the full range of cylindrical Li-ion: 18650, 20700, 21700, 26650 and smaller 10440/14500/16340 cells used in compact pen-style devices.
- Automatic 4.2V cut-off prevents overcharge; reverse polarity and short-circuit protection are active at all times.
On this page
XTAR VC2SL vs VC2: what is the difference?
The core difference is charge current. The VC2 charges at 0.5A per slot; the VC2SL charges at 1A per slot. At 1A, a 3,000mAh 18650 takes roughly three hours from flat; at 0.5A, the same cell takes five to six hours. If you vape during the day and want charged spares ready for the evening, the VC2SL fits that window where the VC2 does not.
The SL bays are also slightly wider, giving cleaner contact with 21700 cells that are marginally thicker than 18650. Both chargers share the same LCD display, compatible cell range and protection suite. The VC2SL costs £3 more than the VC2 at VapeCity. For most vapers running 21700 mods or who simply want faster turnaround, the VC2SL is the better buy.
Compatible batteries and devices
The VC2SL works with any cylindrical Li-ion cell from 10440 to 26650. Cells commonly used in vaping: 18650 (the most widespread format, used in single and dual-battery regulated mods); 21700 (higher-capacity format in current-generation mods like the Geekvape Aegis series and Vaporesso range); 20700 (less common but still used in some transitional-era mods). Compact pen devices using 16340 cells also charge correctly.
Each slot adjusts automatically to cell length via spring contacts. Insert any supported cell positive-end first and the bay grips it correctly regardless of size. Both slots are active simultaneously at 1A each, drawing a total of 2A from the USB supply. Use a 5V/2A wall adapter for best results.
Safety and protection features
XTAR builds the VC2SL with the same protection suite found across their professional charger range. Automatic cut-off at 4.2V (±1%) halts charging when cells are full, then switches to a trickle maintenance mode. Reverse polarity detection prevents damage from backwards-inserted cells. Short-circuit protection activates if a fault is detected in the circuit.
The LCD screen is the key safety tool for vapers: monitoring voltage over time shows you whether your cells are degrading. A healthy 18650 should reach 4.18--4.20V on a quality charger. Cells that plateau at 4.10V or below, or that charge unusually quickly, are reaching end of life and should be replaced before use in high-drain applications.
Should you buy the XTAR VC2SL?
If you run a dual-battery mod and want a reliable, safe external charger with genuinely useful voltage monitoring, the VC2SL is the right choice in the XTAR line-up for most vapers. It charges faster than the entry-level VC2 without the premium price of the USB-C X2. The LCD display is more useful than simple LED indicators for tracking battery health over time.
The one limitation is the micro-USB input. If you want USB-C input and even faster charge rates, the XTAR X2 is the natural next step. But for straightforward 18650 and 21700 care at a mid-range price, the VC2SL delivers.
The good
- 1A per slot is twice as fast as the entry-level VC2.
- Independent dual channels maintain full current to both slots.
- LCD voltage display for real-time monitoring.
- 21700 compatible with wide spring bays.
The catch
- Micro-USB input rather than USB-C.
- No selectable charge-rate option for lower-current trickle charging.
Specifications
| Slots | 2 |
|---|---|
| Input | Micro-USB, 5V/2A |
| Charge current | 1A per slot |
| Cut-off voltage | 4.20V ±1% |
| Compatible cells | 10440, 14500, 16340, 18650, 20700, 21700, 26650 Li-ion |
| Display | Backlit LCD voltage |
| Protections | Overcharge, reverse polarity, short circuit, thermal |
| Brand | XTAR |
| Price | £10.99 |
Frequently asked questions
How fast does the XTAR VC2SL charge an 18650?
At 1A, a 3,000mAh 18650 from fully flat takes approximately three hours. A 3,500mAh cell takes around three and a half hours.
Can I charge two different battery sizes at once in the VC2SL?
Yes. Each slot is independent. You can charge an 18650 in one bay and a 21700 in the other simultaneously, with each receiving the full 1A charge current.
Does the VC2SL charge 21700 batteries properly?
Yes. The SL bays are specifically designed with wider contacts to fit 21700 and 20700 cells securely alongside the standard 18650 format.
What USB adapter do I need for the XTAR VC2SL?
A 5V/2A USB wall adapter is recommended when charging two cells simultaneously. Most modern phone chargers supply at least 2A and work correctly.
Is the XTAR VC2SL better than charging through my mod's USB port?
Yes, for most mods. External charging with the VC2SL charges each cell fully and individually to 4.2V with automatic cut-off. Pass-through USB charging on mods is typically slower, and some dual-battery mods charge cells in series, which can lead to imbalances if cells are not matched.
Delivery
| Standard UK delivery2–3 working days | £2.99 |
|---|---|
| Next-day deliveryorder before 3pm, Mon–Fri | £5.99 |
| Orders over £40free standard UK delivery | Free |
Order before 3pm and we dispatch the same working day. Everything ships in plain, discreet packaging from UK stock, and it’s all TPD-compliant.
Returns
You have a 14-day right to cancel online orders. Because e-liquids, pods, disposables and pouches are sealed for hygiene, change-of-mind returns are accepted only when the item is unused and in its original, unopened packaging — opened or used products can’t be refunded. Anything faulty, damaged or incorrectly supplied is fully covered under the Consumer Rights Act, return postage on us.
Full details on our returns & refund policy page.
Customer reviews
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